Better JSON serialization for Datadog logs

Dicts are now properly serialized to JSON so that Datadog can parse the child attributes.  Also, numbers and nulls are sent as numbers and nulls instead of strings.

litellm/integrations/datadog.py

@@ -9,6 +9,20 @@ import litellm, uuid
 from litellm._logging import print_verbose, verbose_logger
 
 
+def make_json_serializable(payload):
+    for key, value in payload.items():
+        try:
+            if isinstance(value, dict):
+                # recursively sanitize dicts
+                payload[key] = make_json_serializable(value.copy())
+            if not isinstance(value, (str, int, float, bool, type(None))):
+                # everything else becomes a string
+                payload[key] = str(value)
+        except:
+            # non blocking if it can't cast to a str
+            pass
+
+
 class DataDogLogger:
     # Class variables or attributes
     def __init__(
@@ -104,13 +118,7 @@ class DataDogLogger:
                 "metadata": clean_metadata,
             }
 
-            # Ensure everything in the payload is converted to str
-            for key, value in payload.items():
-                try:
-                    payload[key] = str(value)
-                except:
-                    # non blocking if it can't cast to a str
-                    pass
+            make_json_serializable(payload)
             import json
 
             payload = json.dumps(payload)